Already running 6040x1200.
Now that I think of it my coil whine is actually gone aswell.
It was there when I got the card but there is no coil whine at all anymore.
Don't be fooled by the number and the description GPU-Z gives for it, there is really no proof anywhere what ASIC Quality actually means.
Mine is 63% and the card is OKish at overclocking (1200/1475 @ 1.3V)
On another note: Getting the second 7950 today infact instead of Monday! Woohoo!
Now to waste money on a proper 120Hz screen so I can actually get the benefits of Crossfire :l
The higher the ASIC, the worse the overclocking generally is. It just means its going to be more power efficient at the clocks it can achieve.